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470 lines
9.5 KiB
470 lines
9.5 KiB
package validator
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import (
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"fmt"
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"net/url"
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"reflect"
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"strconv"
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)
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// BakedInValidators is the map of ValidationFunc used internally
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// but can be used with any new Validator if desired
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var BakedInValidators = map[string]ValidationFunc{
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"required": hasValue,
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"len": hasLengthOf,
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"min": hasMinOf,
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"max": hasMaxOf,
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"lt": isLt,
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"lte": isLte,
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"gt": isGt,
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"gte": isGte,
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"alpha": isAlpha,
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"alphanum": isAlphanum,
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"numeric": isNumeric,
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"number": isNumber,
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"hexadecimal": isHexadecimal,
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"hexcolor": isHexcolor,
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"rgb": isRgb,
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"rgba": isRgba,
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"hsl": isHsl,
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"hsla": isHsla,
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"email": isEmail,
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"url": isURL,
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"uri": isURI,
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}
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func isURI(val interface{}, field interface{}, param string) bool {
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st := reflect.ValueOf(field)
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switch st.Kind() {
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case reflect.String:
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_, err := url.ParseRequestURI(field.(string))
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return err == nil
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default:
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panic(fmt.Sprintf("Bad field type %T", field))
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}
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}
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func isURL(val interface{}, field interface{}, param string) bool {
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st := reflect.ValueOf(field)
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switch st.Kind() {
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case reflect.String:
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url, err := url.ParseRequestURI(field.(string))
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if err != nil {
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return false
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}
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if len(url.Scheme) == 0 {
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return false
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}
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return err == nil
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default:
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panic(fmt.Sprintf("Bad field type %T", field))
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}
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}
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func isEmail(val interface{}, field interface{}, param string) bool {
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st := reflect.ValueOf(field)
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switch st.Kind() {
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case reflect.String:
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return emailRegex.MatchString(field.(string))
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default:
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panic(fmt.Sprintf("Bad field type %T", field))
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}
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}
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func isHsla(val interface{}, field interface{}, param string) bool {
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st := reflect.ValueOf(field)
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switch st.Kind() {
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case reflect.String:
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return hslaRegex.MatchString(field.(string))
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default:
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panic(fmt.Sprintf("Bad field type %T", field))
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}
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}
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func isHsl(val interface{}, field interface{}, param string) bool {
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st := reflect.ValueOf(field)
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switch st.Kind() {
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case reflect.String:
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return hslRegex.MatchString(field.(string))
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default:
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panic(fmt.Sprintf("Bad field type %T", field))
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}
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}
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func isRgba(val interface{}, field interface{}, param string) bool {
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st := reflect.ValueOf(field)
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switch st.Kind() {
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case reflect.String:
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return rgbaRegex.MatchString(field.(string))
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default:
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panic(fmt.Sprintf("Bad field type %T", field))
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}
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}
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func isRgb(val interface{}, field interface{}, param string) bool {
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st := reflect.ValueOf(field)
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switch st.Kind() {
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case reflect.String:
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return rgbRegex.MatchString(field.(string))
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default:
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panic(fmt.Sprintf("Bad field type %T", field))
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}
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}
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func isHexcolor(val interface{}, field interface{}, param string) bool {
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st := reflect.ValueOf(field)
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switch st.Kind() {
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case reflect.String:
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return hexcolorRegex.MatchString(field.(string))
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default:
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panic(fmt.Sprintf("Bad field type %T", field))
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}
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}
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func isHexadecimal(val interface{}, field interface{}, param string) bool {
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st := reflect.ValueOf(field)
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switch st.Kind() {
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case reflect.String:
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return hexadecimalRegex.MatchString(field.(string))
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default:
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panic(fmt.Sprintf("Bad field type %T", field))
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}
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}
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func isNumber(val interface{}, field interface{}, param string) bool {
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st := reflect.ValueOf(field)
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switch st.Kind() {
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case reflect.String:
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return numberRegex.MatchString(field.(string))
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default:
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panic(fmt.Sprintf("Bad field type %T", field))
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}
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}
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func isNumeric(val interface{}, field interface{}, param string) bool {
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st := reflect.ValueOf(field)
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switch st.Kind() {
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case reflect.String:
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return numericRegex.MatchString(field.(string))
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default:
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panic(fmt.Sprintf("Bad field type %T", field))
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}
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}
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func isAlphanum(val interface{}, field interface{}, param string) bool {
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st := reflect.ValueOf(field)
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switch st.Kind() {
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case reflect.String:
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return alphaNumericRegex.MatchString(field.(string))
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default:
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panic(fmt.Sprintf("Bad field type %T", field))
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}
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}
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func isAlpha(val interface{}, field interface{}, param string) bool {
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st := reflect.ValueOf(field)
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switch st.Kind() {
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case reflect.String:
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return alphaRegex.MatchString(field.(string))
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default:
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panic(fmt.Sprintf("Bad field type %T", field))
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}
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}
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func hasValue(val interface{}, field interface{}, param string) bool {
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st := reflect.ValueOf(field)
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switch st.Kind() {
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case reflect.Slice, reflect.Map, reflect.Array:
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return field != nil && int64(st.Len()) > 0
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default:
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return field != nil && field != reflect.Zero(reflect.TypeOf(field)).Interface()
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}
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}
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func isGte(val interface{}, field interface{}, param string) bool {
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st := reflect.ValueOf(field)
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switch st.Kind() {
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case reflect.String:
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p := asInt(param)
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return int64(len(st.String())) >= p
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case reflect.Slice, reflect.Map, reflect.Array:
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p := asInt(param)
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return int64(st.Len()) >= p
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
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p := asInt(param)
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return st.Int() >= p
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case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
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p := asUint(param)
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return st.Uint() >= p
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case reflect.Float32, reflect.Float64:
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p := asFloat(param)
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return st.Float() >= p
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default:
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panic(fmt.Sprintf("Bad field type %T", field))
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}
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}
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func isGt(val interface{}, field interface{}, param string) bool {
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st := reflect.ValueOf(field)
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switch st.Kind() {
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case reflect.String:
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p := asInt(param)
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return int64(len(st.String())) > p
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case reflect.Slice, reflect.Map, reflect.Array:
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p := asInt(param)
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return int64(st.Len()) > p
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
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p := asInt(param)
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return st.Int() > p
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case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
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p := asUint(param)
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return st.Uint() > p
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case reflect.Float32, reflect.Float64:
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p := asFloat(param)
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return st.Float() > p
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default:
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panic(fmt.Sprintf("Bad field type %T", field))
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}
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}
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// length tests whether a variable's length is equal to a given
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// value. For strings it tests the number of characters whereas
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// for maps and slices it tests the number of items.
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func hasLengthOf(val interface{}, field interface{}, param string) bool {
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st := reflect.ValueOf(field)
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switch st.Kind() {
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case reflect.String:
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p := asInt(param)
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return int64(len(st.String())) == p
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case reflect.Slice, reflect.Map, reflect.Array:
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p := asInt(param)
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return int64(st.Len()) == p
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
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p := asInt(param)
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return st.Int() == p
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case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
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p := asUint(param)
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return st.Uint() == p
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case reflect.Float32, reflect.Float64:
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p := asFloat(param)
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return st.Float() == p
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default:
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panic(fmt.Sprintf("Bad field type %T", field))
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}
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}
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// min tests whether a variable value is larger or equal to a given
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// number. For number types, it's a simple lesser-than test; for
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// strings it tests the number of characters whereas for maps
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// and slices it tests the number of items.
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func hasMinOf(val interface{}, field interface{}, param string) bool {
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return isGte(val, field, param)
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}
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func isLte(val interface{}, field interface{}, param string) bool {
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st := reflect.ValueOf(field)
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switch st.Kind() {
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case reflect.String:
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p := asInt(param)
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return int64(len(st.String())) <= p
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case reflect.Slice, reflect.Map, reflect.Array:
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p := asInt(param)
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return int64(st.Len()) <= p
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
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p := asInt(param)
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return st.Int() <= p
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case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
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p := asUint(param)
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return st.Uint() <= p
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case reflect.Float32, reflect.Float64:
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p := asFloat(param)
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return st.Float() <= p
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default:
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panic(fmt.Sprintf("Bad field type %T", field))
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}
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}
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func isLt(val interface{}, field interface{}, param string) bool {
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st := reflect.ValueOf(field)
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switch st.Kind() {
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case reflect.String:
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p := asInt(param)
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return int64(len(st.String())) < p
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case reflect.Slice, reflect.Map, reflect.Array:
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p := asInt(param)
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return int64(st.Len()) < p
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
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p := asInt(param)
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return st.Int() < p
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case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
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p := asUint(param)
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return st.Uint() < p
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case reflect.Float32, reflect.Float64:
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p := asFloat(param)
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return st.Float() < p
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default:
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panic(fmt.Sprintf("Bad field type %T", field))
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}
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}
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// max tests whether a variable value is lesser than a given
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// value. For numbers, it's a simple lesser-than test; for
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// strings it tests the number of characters whereas for maps
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// and slices it tests the number of items.
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func hasMaxOf(val interface{}, field interface{}, param string) bool {
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return isLte(val, field, param)
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}
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// asInt retuns the parameter as a int64
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// or panics if it can't convert
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func asInt(param string) int64 {
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i, err := strconv.ParseInt(param, 0, 64)
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if err != nil {
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panic(err.Error())
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}
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return i
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}
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// asUint returns the parameter as a uint64
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// or panics if it can't convert
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func asUint(param string) uint64 {
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i, err := strconv.ParseUint(param, 0, 64)
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if err != nil {
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panic(err.Error())
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}
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return i
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}
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// asFloat returns the parameter as a float64
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// or panics if it can't convert
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func asFloat(param string) float64 {
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i, err := strconv.ParseFloat(param, 64)
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if err != nil {
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panic(err.Error())
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}
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return i
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}
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